While yeast or nutritional yeast are often beneficial, we have found that it can make meals acidic or cause heartburn (We had tested nutritional yeast in some meals but general feedback from customers and industry professionals made us question the side effects).
It is our personal preference not to use nutritional yeast (for now) It is probably not the yeast but that fact that the yeast is in a highly refined carbohydrate, as is usually the case with bread and cakes.
The FitChef Way
We also prefer getting the flavour from whole food, nutrient dense, fibre-rich herbs, spices, and natural inland salt.